[Orgmode] reference headlines and export html as section number

[Ning Sean]

Hi,

 

I want to reference a headline inside another headline, and showing the section number when exporting to html.

 

So suppose I have an org file:

 

* headline A

* headline B references <<headline A>>

 

When export to html, I want to see the following:

 

1 headline A

2 headline B references 1

 

How do I do that?

 

Thanks,

Ning